Daikin 2MXL18WMVJU9, Installation Manual

Page 1: ...LLATION MANUAL R410A Split Series Installation manual Manuel dinstallation Manual de instalación MODELS 2MXS18WMVJU9 3MXS24WMVJU9 4MXS36WMVJU9 2MXL18WMVJU9 3MXL24WMVJU9 2MXLH18WVJU9 3MXLH24WVJU9 Manuel dinstallation 00_CV_3P675080 1 indd 1 2022 03 01 11 25 45 ...

Page 2: ...h Do not ground units to water pipes gas pipes telephone wires or lightning rods as incomplete grounding can cause a severe shock hazard resulting in severe injury or death Additionally grounding to gas pipes could cause a gas leak and potential explosion causing severe injury or death If refrigerant gas leaks during installation ventilate the area immediately Refrigerant gas may produce toxic gas...

Page 3: ... or moisture should be prevented from getting into the system b Tight R410A does not contain any chlorine does not destroy the ozone layer and does not reduce the earth s protection again harmful ultraviolet radiation R410A can contribute to the greenhouse effect if it is released Therefore take proper measures to check for the tightness of the refrigerant piping installation Read the chapter Refr...

Page 4: ...will flow from the drain of the outdoor unit do not place anything under the unit which must be kept away from moisture 9 A location where flammable gas does not leak Position at least 6 5 8ft 2m from propane gas cylinders NOTE Cannot be installed suspended from a ceiling or stacked CAUTION When operating the air conditioner in a low outdoor ambient temperature be sure to follow the instructions d...

Page 5: ...m bottom to top 9 13 16 250 from wall Allow space for piping and electrical servicing Level mounting base available separately If there is a danger of the unit falling or overturning fix the unit with foundation bolts or with wire or other means If strong wind blows into the air discharge side from the front and there is a danger that the fan may be damaged change the orientation of the air dischar...

Page 6: ...d to either change the orientation of the outdoor unit outlet side or use the air direction adjustment grille sold separately Selecting a Location for Installation of the Indoor Units The maximum allowable length of refrigerant piping and the maximum allowable height difference between the outdoor and indoor units are listed below Refrigerant piping must be kept to a minimum The suggested shortest...

Page 7: ...ze is determined by the size of the indoor unit fittings Reducers are used at the outdoor unit to accommodate the correct gas line pipe size 3MXS 3MXL 4MXS Port 2MXS 2MXL B 07 09 12 15 18 07 09 12 15 07 09 12 15 18 D 07 09 12 15 18 24 A 07 09 12 07 09 12 07 09 12 C 07 09 12 15 18 07 09 12 15 18 Use a reducer to connect pipes Use No 1 and 3 reducers Use No 2 and 4 reducers Use No 5 and 6 reducers R...

Page 8: ...ttach the gasket 2 Connecting a pipe of φ3 8 inch 9 5mm to a gas pipe connection port for φ1 2 inch 12 7mm Connection port of outdoor unit No 4 No 2 Flare nut for φ1 2 inch 12 7mm Be sure to attach the gasket Flare nut tightening torque φ3 8 inch 9 5mm φ1 2 inch 12 7mm φ5 8 inch 15 9mm 24 1 8 29 1 2Ibf ft 32 7 39 9N m 36 1 2 44 1 2Ibf ft 49 5 60 3N m 45 5 8 55 5 8Ibf ft 61 8 75 4N m When using the...

Page 9: ...hich are delivered with this unit Never install a dryer to this R410A unit in order to guarantee its service life The drying material may dissolve and damage the system Improper flaring may result in refrigerant gas leakage CAUTION Do not reuse joints which have been used once already 1 Cut the pipe end with a pipe cutter 2 Remove burrs with the cut surface facing downward so that the filings do n...

Page 10: ...the pipe from dust and moisture All pipe bends should be as gentle as possible Use a pipe bender for bending Wall If no flare cap is available cover the flare mouth with tape to keep dirt and water out Be sure to place a cap Rain Selection of copper and heat insulation materials When using commercial copper pipes and fittings observe the following Insulation material Polyethylene foam Heat transfer ...

Page 11: ...7MPa for 1 hour minimum 24 hours recommended If there is a pressure drop check for leaks make repairs and perform the pressure test again 2 Connect the gauge manifold s charging hoses to the service ports of each stop valve 3 Fully open the low pressure valve Lo and the high pressure valve Hi on the gauge manifold 4 Evacuate system using vacuum pump to below 500 microns for 1 hour minimum 5 Close ...

Page 12: ...t be upside down to fill with liquid Filling other cylinders Turn the cylinder upside down when filling Be sure to use the R410A tools to ensure pressure and to prevent foreign objects from entering 7 Charging with refrigerant CAUTION Even though the stop valve is fully closed the refrigerant may slowly leak out do not leave the flare nut removed for a long period of time If the total length of pipi...

Page 13: ...take care not to pull at the conduit Do not connect the power wire to the indoor unit Doing so may cause electric shock or fire Do not turn on the circuit breaker until all work is completed CAUTION Precautions to be taken for power supply wiring Recommend stranded cable for interunit wiring Local code always supersedes recommendation For stranded wires make sure to use the round crimp style termi...

Page 14: ... not disconnect 5 Pass the wiring through the cutout on the bottom of the protection plate and attach the protection plate 6 After completing the work reattach the service lid to its original position Outdoor unit 60Hz 208 230V To room B To room C To room D Room A Room A Room C Room D Room B Indoor unit power supply Follow local codes for wiring and safety devices between outdoor unit and power so...

Page 15: ...n mode of the set indoor unit 2 Priority during powerful operation If the indoor unit which is set for priority room setting is operating at powerful the capabilities of other indoor units will be somewhat reduced Power supply gives priority to the indoor unit which is set for priority room setting 3 Quiet operation priority Setting the indoor unit to quiet operation will make the outdoor unit run...

Page 16: ...ting in night quiet mode Setting procedure Turn the night quiet mode switch SW6 1 to on COOL HEAT mode lock S15 Use the S15 connector to set the unit to only cool or heat Setting to only heat H short circuit pins 1 and 3 of the connector S15 Setting to only cool C short circuit pins 3 and 5 of the connector S15 The following specifications apply to the connector housing and pins JST products Housi...

Page 17: ...oling operation 5 Attach the valve caps once procedures are complete Gas stop valve Close Hexagonal wrench Liquid stop valve Valve caps Forced cooling operation WARNING Do not remove the switch cover unless the power has been turned off Risk of electric shock 1 Turn off the power 2 Remove the service lid 2 screws 3 Remove the service PC board switch cover 1 screw 4 Switch SW5 and SW6 to off 5 Turn...

Page 18: ...rrection is possible as shown in the table below For details on how to read the LED display refer to the collective indications label on the reverse side of the top plate or the service manual If self correction is not possible check the indoor unit wiring and piping in the usual manner Service PC board A 1 2 3 4 5 Wiring error check switch SW3 LED Status 1 2 3 4 All Flashing Automatic correction ...

Page 19: ... Temperature difference between inlet and outlet About 14 F 8 C About 36 F 20 C When running in one room 2 5 After trial operation is complete set the temperature to a normal level 78 F to 82 F 26 C to 28 C in COOL operation 68 F to 75 F 20 C to 24 C in HEAT operation The air conditioner draws a small amount of power in its standby mode If the system is not to be used for some time after installat...

Page 20: ...Two dimensional bar code is a manufacturing code 3P675080 1 M21B361 2203 HT 00_CV_3P675080 1 indd 2 2022 03 01 11 25 45 ...